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/lp/american-physical-society-aps/statistical-variations-of-the-elementary-flux-pinning-force-and-their-y3ZtMtRU02
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- Publisher
- American Physical Society (APS)
- Copyright
- Copyright © 1992 The American Physical Society
- ISSN
- 1095-3795
- DOI
- 10.1103/PhysRevB.46.2964
- Publisher site
- See Article on Publisher Site
Abstract
It is a common procedure to infer the flux-pinning mechanism from the shape of the bulk-pinning-force curve F p ( b ). In this paper, we investigate the effects of having a distribution of elementary pinning forces ( f p ) on F p ( b ) within the framework of fluxon core pinning and full summation. It is seen that the shape of F p ( b ) can be significantly changed when the pins are strong and their f p distribution broad, whereas traditional ideas accept that its shape remains constant. A shift of the peak of F p ( b ) to lower field and an increase in the curvature of the high-field portion of F p ( b ) is seen. We find confirmation of the model in optimized high- J c Nb-Ti composites, which have a broad distribution of α-Ti precipitate thicknesses.
Journal
Physical Review B – American Physical Society (APS)
Published: Aug 1, 1992